Sellin, Thorsten, author
Wiley Eastern Private Limited, 1970
Buku Teks
[edited by] William E. Thompson, Jack E. Bynum
Allyn and Bacon, 1991
Buku Teks
Trojanowicz, Robert C., 1941-, author
Prentice-Hall, 1987
Buku Teks
Trojanowicz, Robert C., 1941-, author
Prentice-Hall, 1992
Buku Teks
Street, David
The Free Press, 1966
Buku Teks